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Great Conjunction - Jupiter & Saturn - 2020 DEC 21

Posted: Sun Dec 06, 2020 8:42 pm
by Curt
On 2020 DEC 21 at 18:21 UT Jupiter and Saturn will appear to have a geocentric angular separation of only 6.1 arcminutes, the narrowest since 1623 and until 2080. However, those separations are not small enough for Jupiter to occult Saturn. The last such occultation occurred in 6857 BC, while the next two will both occur during 7541.

Great Conjunctions between Jupiter and Saturn occur about every 20 years. That’s their mutual synodic (lapping) period with a mean value of 19.86 years. Sometimes the conjunctions are triple due to the effect of apparent retrograde motion, but not this time.

My Great Conjunction chart depicting the relative positions of Jupiter and Saturn during December 19-23 can be viewed at https://www.CurtRenz.com/jupiter.html

Photos and descriptions of the upcoming conjunction would be welcome additions to this thread.

Re: Great Conjunction - Jupiter & Saturn - 2020 DEC 21

Posted: Mon Dec 07, 2020 7:15 am
by zinc
Perhaps you should give more information about your website in terms of technical details and any information that is relevant to this forum/thread. I was about to delete it as it looks like spam.

Give details about the site (in relations to WWB) and only then write about the subject.